Hahne-Kedar Greaves: In a tent from the opposite end of where you enter the first base.

Pistol Magazine Upgrade: Between General Corinthus' tent and a tent with a workbench, Pistol Piercing Mod, Armax Arsenal Shoulder Armor, and a workbench, this mod will be atop of a crate next to a datapad.

Assault Rifle Magazine Upgrade: In the airfield after leaving General Corinthus' base for the second time, this mod is located near the center alongside some thermal clips.

Sniper Rifle Spare Thermal Clip: After defeating the Brute and wandering down a winding pathway, you will find two soldiers. This mod will be next to one of them.

Sniper Rifle Enhanced Scope: In the second camp, head all the way to the left along the wall. Once you reach the other end, look to your right and, in front of a tent next to a medkit, this mod can be found.Note: Make sure to get this item before the end of the fight in the second camp, as the mission will then end automatically and you won't be able to get this item.

Shotgun Blade Attachment: After going back outside, you will encounter a group of enemies. In an alcove to the right after encountering these enemies, this mod will be waiting on a shelf on the wall.

Shotgun Spare Thermal Clip: After fighting two groups of enemies, you will enter a room where the passageway is blocked by two plumes of fire. Vaulting the barrier to the left and then jumping over the pit to your right, you can see this mod in a corner to your right.

Pistol High-Caliber Barrel: After being shot at by the two enemies standing in an open shuttle, head to your left past the overhang. When you encounter the next group of enemies, hug the left wall, and this mod will be on a shelf.

Armax Arsenal Greaves: After standing to be identified by a scanner, you will enter a large room with two floors. Walk straight ahead on the floor you entered from, and this armor will be waiting on top of the first table in front of you.

Sentry Interface: In the same room as the Armax Arsenal Greaves, on the same floor, head to the opposite end of the ground floor from where you entered, past the ladder, and head to your left. This armor is lying atop of the bench to your right.

M-13 Raptor: After entering the vicinity of the second quarantine checkpoint, head straight onwards from the entrance until you hit the wall. To your right on a bench, near a corpse, is this sniper rifle.

Pistol Scope: After entering the vicinity of the second quarantine checkpoint, hug the wall to the left of where you initially enter. This mod is atop of a desk perpendicular to the left wall.

Scorpion: After reaching the second quarantine checkpoint, you will need to find a power terminal. In the same red room as the power terminal, on the opposite wall from the terminal on the ground, you can find this pistol.

Death Mask: After finding the Graal, behind you next to the Krogan working on the crawlers.

Shotgun Smart Choke: After finding the Graal, behind you next to the Krogan working on the crawlers.

Pistol Melee Stunner: After finding the Graal, behind you next to the Krogan working on the crawlers.

SMG Scope: After Kalros smashes through the bridge guarded by two Ravagers, pass through the covered structure and head down the steps. This will put you in a triangular area which your party will recognize as some sort of memorial. Once you've defeated the enemies that attack you, look around the rubble on the left side (as you enter from the covered structure). The mod is on the ground by the rubble.

Assault Rifle Extended Barrel: After picking up the scope above, there will be a flight of stairs. At the landing, turn to your left; this mod is on the floor.

M-5 Phalanx: Immediately after debarking the convoy to activate the maw hammers, head up the flight of stairs. This weapon will be to your left on the landing.

M-25 Hornet: On a dead Cerberus soldier in the middle of the room leading to the four above items.

Sniper Rifle Piercing Mod: In the large, open room which exits to the Executor's office (there is a sign above the exit which says 'Executor'), turn to your right at the exit. On the corner of the long desk, you can pick up this mod.

Umbra Visor: In the first courtyard behind Lieutenant Kurin, leaning against a barrier.

Shotgun High Caliber Barrel: On balcony above broken shotgun (3000 credits), opposite M-98 Widow (the ramp leading up to this mod is located in right corner before going up the ramp to the Asari sniper and M-98 Widow.)

M-98 Widow: About half way through the mission, on the perch the Asari sniper stands on.

Sniper Rifle Concentration Mod: Near the M-98 Widow.

Assault Rifle Extended Barrel: After your first fight with the ravagers, at the top and tucked between the rubble to the right.

SMG Heat Sink: On the ground outside the Athame Temple in front of the force field.

Pistol Scope: After you enter the first building, go downstairs, and fight a group of Cerberus Troopers, pick up this mod next to a Cerberus trooper corpse lying next to a desk on top of a short set of stairs.

Rosenkov Materials shoulders: To the left of exit door in the second chamber after draining the pool; it is on top of a bulkhead.

M-12 Locust: Located in the room where you encounter cannibals and marauders supported by a barrier engine, after repairing a console, on a table in the raised right side of the lab.

Shotgun Blade Attachment: Just past the M-12 Locust on another table.

M-99 Saber: After the fight with the Brutes and Banshee, in one of the closed husk pods. Opening the pods requires overriding the controls at a terminal at the opposite end of the same hall. The terminal is a hologram of the husk pods in a small alcove just before the small set of stairs.

M-37 Falcon: After launching the fighter into the wall, the weapon can be found between the debris.

Serrice Council Greaves: Behind you after viewing the first set of three logs (Lazarus Project).

Delumcore Overlay: After a conversation with Hackett about attacking the station and EDI bypassing the second of two doors, turn right and proceed to the end of the corridor and enter the door on the right, walk around the console and crates in the center to find this pickup.

Note: Completing the mission objective will end the mission instantaneously. Make sure to collect all items beforehand.

Old Power Grid Schematics: On the other desk apart from the cannon controls in the control room, you can pick up this item by clicking on a hologram.

Armax Arsenal Gauntlets: Near the control room, there are two ramps downwards, one closer to the desk which holds the Old Grid Schematics listed above and which leads outside, and one closer to the actual cannon controls that leads to another room within the same building. Take the ramp to the other room inside the building, and against the wall at the opposite end from the ramp you can pick up this armor.

Assault Rifle Stability Damper: After you begin to head towards Orion Hall, take the door to the right at the sign that reads 'Ascension Hall.' In this next room, climb over the barrier to your right and head up the stairs leading to a door. This mod will be near the top.

SMG Heat Sink: After you encounter the biotic being confronted by two Cerberus troopers, jump over the barrier into the next room. This item is located directly across the room from the barrier.

M-22 Eviscerator: After you watch the student being gunned down by Cerberus troops, head into the hallway from which he came (it is on the left from where you entered.) This gun is lying on a couch to your left from entering this hall.

M-96 Mattock: After you watch the student being gunned down, open the door to the right from where you enter. There is a couch in front of you as you enter this new room; this gun will be lying on its right side from where you enter.

Mnemonic Visor: After you grab the Mattock, head in a straight line away from where you entered this room until you reach the wall. To your left is a couch, and atop of it is this armor.

Assault Rifle Precision Scope: This is lying atop one of the desks upstairs, where the students are, after fighting an Atlas for the first time.

M-96 Mattock (or M-22 Eviscerator): This is contingent on whether you made a Paragon decision at the end of the Mass Effect 2 DLC, Project Overlord. If you made a Paragon decision, a room will be unlocked for you. This gun will be inside. Might be replaced by an M-22 Eviscerator on some playthroughs.

Sniper Rifle Piercing Mod: This mod is also contingent on whether you made a Paragon decision at the end of the Mass Effect 2 DLC, Project Overlord. This is in the same unlocked room as the Mattock above.

Biotic Amp Interfaces: After meeting Octavia, the tech student shielding herself and other students from the Cerberus troopers, continue towards the next objective. In the next room, you will find a console on the right near the door. You can download the Biotic Amp Interfaces here.

Serrice Council Chestplate: After the room in which you download the Biotic Amp Interfaces, open the door. In the wrecked room you find, head to the left from where you entered. This armor is lying on the couch on the left wall.

SMG Magazine Upgrade: This item is located in the room after encountering the unmanned Atlas. Directly to the left of the entrance to this room, this mod is lying on a couch.

M-6 Carnifex: After climbing the ladder in the gas-lit maintenance area after leaving the scientists, this will be on top of a pipe to your left.

SMG High-Caliber Barrel: Within a crate alcove amongst some thermal clip boxes on the left after the first encounter with Cerberus back outside, directly before the Telemetry Override.

Sniper Rifle Piercing Mod: Before climbing either tower against the back wall between the towers.

Shotgun Spare Ammo: Climb down the ladder next to the AA gun that is to your right as you approach. On the landing between the first and second ladders, you can pick up this mod.Note: The lower ladder on the right is down-only; you will be able to see this mod from the ground but you must go up the left ladder, then over the connecting platform and back down.

M-300 Claymore: In the container, in building on left, at the start of the mission.

Pistol High-Caliber Barrel: In the container to the left of the Claymore.

SMG High-Caliber Barrel: To the right of the weapon bench.

Shotgun Shredder Mod: After encountering the first Ravager, to the left next to a dead krogan.

Krogan Dying Message: After the roof collapses, hug the left wall. This item can be found behind one of the sections of webbing that can be burnt through.Note: When you pick up this item, it will not register on your screen immediately; however, it will still be included in your journal.

Shotgun Spare Ammo: After the roof collapses and you emerge from the narrow cavern into the more brightly-lit, wider area, you will encounter two groups of enemies. After finishing off the second, head to the left wall. This item will be against the wall.

Ariake Technologies Shoulders: After picking up the Shotgun Spare Ammo, you will drop down and need to follow a winding path. Eventually, you will need to jump over a gap in order to continue. Up the path in front of you, you will see what looks like two blue lights. This is a dead krogan; this armor is lying next to him.

Dogtags: Head to the street to your right from where you start; you will come to a stop in front of building 22. Next to the second closest square column to the left of building 22, the dog tags are lying on the ground nearby.

Capacitor Helmet: In the same courtyard, to the left of building 22, is building 97. In the corner where 97 and 22 abut, just above the painted numbers 97, is a yellow and black dumpster. This helmet is next to it on the ground.

First Terminal with Resistance Movement Data: In building directly behind Elevator Console.

Second Terminal with Resistance Movement Data: After raising elevator and first fight, the terminal is located in Building 5 (to the left after leaving elevator) along the back wall.

Third Terminal with Resistance Movement Data: Drop out of doorway to the right of the second terminal and proceed into Building 2 (which will have 9s on the walls inside); go all the way through the building until you see a row of monitors and terminals, the center terminal has the data.

Assault Rifle High-Velocity Barrel: After climbing the first ladder, turn around and destroy the canisters. Activate the lift at the nearby console and climb back down the ladder. Ride the lift to the top to find the mod.

Hacker Terminal 1: The first terminal you need for Omega: Assist the Hacker is right next to the lift controls mentioned above.

Hacker Terminal 2: The second terminal can be found in the same room as your first battle with Cerberus, next to the open windows on your right as you enter.

Hacker Terminal 3: After deactivating the Cerberus lockdown in the first room off the hallway, the final terminal is in the second room behind a Turian mercenary you can revive for XP.

Phaeston: In front of you after joining with Nyreen (only present if you do not already have the Phaeston at any level)

Shotgun High-Velocity Barrel: To the right after joining with Nyreen.

Sniper Rifle Thermal Scope: At the start of the right catwalk when approaching the Talons' base.

Shotgun Omni-Blade: Near the thankful turian once inside the Talons' base.

Pistol Power Magnifier: After falling into the lower wards, after the second firefight, in a store called Ryuusei.

Assault Rifle Ultralight Materials: After using Spectre status to bypass the door, the mod will be on display in a store called Cepheid Variables.

Sniper Rifle Ultralight Materials: After meeting Shepard's love interest (if squadmate) or Liara (if unromanced or love interest is not a member of Shepard's squad), on the floor opposite the used skycars, directly behind you after the meeting cutscene.

Shoulders - In a tent next to General Corinthus' in Priority: Palaven, near a weapon bench and a pistol piercing mod

Greaves - In Priority: Sur'Kesh, you will eventually need to stand still to be identified by a scanner. After this, you will head into a large room with two floors. Walk straight ahead from where you entered on the ground floor, and this armor will be on the first table in front of you.

Gauntlets - In N7: Cerberus Attack, there are two ramps near the cannon controls. One ramp leads outside, and is nearer the Old Power Grid schematics. The other is a ramp that leads to another room in the same building, and is closer to the cannon controls. Head down the ramp that leads to another room, and on the opposite end from the ramp this piece of armor is lying in front of the wall.

Helmet - In Grissom Academy: Emergency Evacuation, head to the right door after watching the student being gunned down, and head forward from the exit until you reach the wall. To your left should be a couch; this armor lies atop of it.

Helmet - In Priority: Sur'Kesh, after holding still for a scanner to identify you, you will enter a large, two-story room. On the ground floor, head to the opposite end of this room from where you initially entered, going to the right past a ladder and then to your left. On a bench to your right in this alcove you can find this piece of armor.

Chest - During Grissom Academy: Emergency Evacuation. Open the door to the right of Octavia and the others taking refuge from two Cerberus troops under an experimental shield bubble emitter. Head through the hallway into the wrecked room. After jumping over the couch, head to the left wall from where you entered. This armor will be lying on the couch.

M-96 Mattock - In Grissom Academy: Emergency Evacuation, after you watch the student being gunned down, go to the door to your right from where you enter. When you enter this new area, you should see a couch in front of you. This gun is lying on its right side. In addition, in the same mission, you can find this gun again in a room that is unlocked if you completed the Mass Effect 2 DLC Project Overlord and made a Paragon decision at the end.

M-99 Saber - In Priority: Horizon, in one of the closed husk pods. Opening the pods requires overriding the controls at a terminal in the same hall.

Chakram Launcher - Requires completing the Kingdoms of Amalur: Reckoning demo and linking the Origin account to the game. when you reach T-section during the Omega: mines during Mass Effect 3: Omega, turn right and right once more and it's against the wall.

M-358 Talon - Can be acquired during Priority: The Citadel II. The weapon is in a locked room right before reaching the Executor's office. The door can be opened via a terminal in one of the rooms in the same area.

Scorpion - In Priority: Sur'Kesh, after reaching the second quarantine checkpoint you will need to access a power terminal. In the same red room as the power terminal, on the wall opposite of said terminal, you will find this pistol lying on the ground.

M-22 Eviscerator - In Grissom Academy: Emergency Evacuation, after you watch a student being gunned down, head into the room he came from (it is to the left from where you entered.) To your left as you enter this new room is a couch; the shotgun is lying atop of it

M-13 Raptor - In Priority: Sur'Kesh, in the area of the second quarantine checkpoint, head straight onwards from the entrance until you hit the wall. To your right, this sniper rifle is lying atop of a bench near a corpse.

M-29 Incisor - In Tuchanka: Bomb, after clearing the first field the weapon can be found on the left hand side of a ramp leading to the next area.

The following is a list of all weapon modifications. For the sake of organization, numbers 1-3 are found on missions, while 4 and 5 are found in stores, though you may buy store mods before finding the ones on missions. However, a (2) marked next to the second store mod indicates that it will only appear in that store after the previous one is bought. The first store mod costs 4000 credits, and the second costs 6000, before discounts and markups.

Grissom Academy: Emergency Evacuation - Take a right at the sign that reads 'Ascension Wing' and use the door. In the area you enter, climb over the barrier to your right and head up the stairs. This mod is located near the top in front of the closed door.

Priority: Sur'Kesh - After clearing the first outdoor checkpoint, walk to the overhang ahead and move to the left; when you encounter the next group of enemies, hug the left wall from where you entered. This mod will be waiting on a shelf against the left wall.

Priority: Palaven - Between General Corinthus' tent and a tent with a workbench, Pistol Piercing Mod, Armax Arsenal Shoulder Armor, and a workbench, this mod will be atop of a crate next to a data pad.

Priority: Sur'Kesh - After reaching the second outdoor quarantine checkpoint, head left from the initial exit hugging the left wall. This mod can be found atop of a desk perpendicular to the left wall.

Priority: Palaven - In Victus' camp, head all the way to the left from the entrance. After hitting the other end, to your right there will be a tent. This mod will be lying in front of the tent next to a medkit. Get it before defeating all enemies, as the mission will end immediately after the last enemy falls.

N7: Cerberus Lab - In the room that the ramp to the left leads to, you can find this mod tucked into the corner on your left after you have entered the room.

All Medi-Gel Capacity upgrades are available from the Sirta Supplies terminal at Huerta Memorial Hospital or through the Procurement terminal aboard the Normandy (for a 10% price markup) after certain Priority missions. There are six in total:

Gallae's Electronic Signature - Kallini: Ardat-Yakshi Monastery, to the left in a small office in the very first pitch black room after descending into the monastery.

Prejek Paddlefish - The Prejek Paddlefish intel can be obtained by importing a Mass Effect 2 save file where Shepard purchased the Prejek Paddle Fish, and Kelly Chambers and Shepard's fish survived. Upon meeting Kelly on the Citadel in Mass Effect 3, she will return Shepard's fish. If they survive until the game is completed and that save file is imported into New Game +, then the intel will be acquired after returning to the Normandy SR-2.

Biotic Amp Interfaces - In Grissom Academy: Emergency Evacuation, after you meet Octavia, the woman who is shielding herself and other students from some Cerberus Troopers, continue onwards past the next door to the objective. In the next area, before the door, there is a console from which you can download this item.

Old Grid Schematics - In N7: Cerberus Attack, go into the control room for the cannon (it is the most elevated position on the map.) On the other desk from where you can control the cannon, search the hologram to pick up this item.

Dying Krogan Message In Attican Traverse: Krogan Team, after passing through the first door blocked off by a shield generator, the roof will cave-in. Immediately after, hug the left wall and burn through the sections blocked off by webbing. This will be found behind one of the sections, near a dead Krogan.

Hesperia-Period Statue - the gas giant Polissa in the Vernio system of the Athena Nebula.

Dogtags - During the N7: Cerberus Abductions mission, look for dogtags which are located in the courtyard opposite building number 27, next to the second closest square column to building number 22.

Cerberus Automated Turret Schematics - from some crates before meeting with Lt. Victus during Tuchanka: Bomb.

Cerberus Ciphers - Codes can be obtained via a terminal on the mission N7: Communication Hub. After the 2nd objective, the terminal is on the far right.

Cerberus Turian Poison - found during the mission Arrae: Ex-Cerberus Scientists in a corner of the main room on top of a box. It looks like a microscope.

Chemical Treatment - found in the mission N7: Fuel Reactor. Head up to the left area at the start, on a datapad that overlooks the radiation below you.

Heating Unit Stabilizers - acquired during the mission N7: Cerberus Fighter Base, on the opposite wall, where the first objective is located, under the ceiling.

Kakliosaur Fossil - planet Intai'sei in the Phoenix system of the Argos Rho cluster.